Digital overcurrent relay with 3×3-digit LED display TRM-200

Three-phase current relay for load current control/limiting in the range of 90-200 A, manufacturer TENSE (Türkiye)

The TRM-200 digital overcurrent relays were developed to protect loads from damage caused by high currents while also enabling monitoring of operation.

- 90-200 A (adjustable overcurrent value)
- 50% fixed current asymmetry
- Adjustable error delay time
- Adjustable operating mode (automatic, semi-automatic, manual)
- When you purchase a TENSE brand current relay, you receive a ready-to-use device - current transformer included.

Use of the device and its operation

1. Connect the device according to the wiring diagram.
2. Once the wiring is complete, switch on the device. After switching on, the display will show the set values ​​for 5 seconds.
3. The overcurrent value is set using the "A>" control. The set value is displayed in the left-hand display.
4. Use the "t" control to set the delay time. The set value is also displayed on the left display.

When switching on the device:
- The relay switches on, the output contact switches to terminal 3 and the OUT indicator lights up.
- If the current exceeds the set overcurrent value (A>), the device starts counting down the delay time and the ERR indicator lights up.
- After the set time has elapsed, the relay switches off, the contact switches to terminal 1 and the OUT indicator goes out.

Description

The TRM-200 series electronic current relay is designed for the automatic shutdown of devices when the maximum permissible current is exceeded.
It features a programmable switching range, delay time, and restart time.
There are 3 modes for returning to operating state - MANUAL, SEMI-AUTOMATIC, AUTOMATIC.

Reset modes:

- Manual mode: After an overcurrent fault, the device must be reset by pressing the reset button. In this mode, the corresponding LED will light up.
- Semi-automatic mode: After an overcurrent fault, the system automatically resets three times and then waits for a manual reset upon the next fault. The corresponding LED illuminates in this mode.
- Automatic mode: The system resets automatically after each overcurrent fault. The corresponding LED illuminates in this mode.

Note: To change the mode, press and hold the SELECT button for 10 seconds. When the mode is changed, the corresponding LED indicator will light up.

Asymmetry 50% (fixed)

If the difference between the largest and smallest phase current exceeds 50%, the device enters asymmetry error mode within 2 seconds.
(This prevents damage to the system in the event of a phase failure during engine operation).

During an asymmetry error:
- The indicator group of the two phases that caused the fault flashes and the ERR indicator lights up.
- To return from asymmetry error mode, the device must be manually reset.

Technical parameters:

- Operating voltage : 150-260 VAC.
- Operating frequency: 50/60 Hz
- Power consumption: < 6 VA
- Operating temperature: -20 °C to +55 °C
- Display: 3x3 digits, 5 LEDs
- Overcurrent setting (A>): 90-200 A
- Delay time: 1 s - 200 s
- Connection type: Terminal
- Contacts: 5 A / 250 V AC (active load)
- Wire diameter: 2.5 mm²
- Weight: max. 250 g
- Mounting: on DIN rail
- Operating altitude: < 2000 m

Note: The TRM-50, TRM-100, TRM-200 and TRM-300 can only be used with the current transformers included in the scope of delivery.

The TRM-400 can be used with the included 400/5 current transformer.

Basics